The soundtrack to Ali, starring Will Smith in the title roll, will feature new material from R. Kelly, Alicia Keys and Everlast.

Kelly, whose hit "I Believe I Can Fly" came from 1996's Space Jam soundtrack, contributed two new, Ali-inspired songs, "The World's Greatest," the album's leadoff track and first single, and "Hold On." Keys' appropriately titled "Fight" and "The Greatest" from former-boxer Everlast were also written with the Champ in mind.

The collection also features classic material from Aretha Franklin and Al Green, and more contemporary tracks from Bilal and Angie Stone, among others.